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5216 Commits

Author SHA1 Message Date
Chris Lattner
cda8875433 when we know the signbit of an input to uint_to_fp is zero, 
change it to sint_to_fp on targets where that is cheaper (and
visaversa of course).  This allows us to compile uint_to_fp to:

_test:
	movl	4(%esp), %eax
	shrl	$23, %eax
	cvtsi2ss	%eax, %xmm0
	movl	8(%esp), %eax
	movss	%xmm0, (%eax)
	ret

instead of:

	.align	3
LCPI1_0:					##  double
	.long	0	## double least significant word 4.5036e+15
	.long	1127219200	## double most significant word 4.5036e+15
	.text
	.align	4,0x90
	.globl	_test
_test:
	subl	$12, %esp
	movl	16(%esp), %eax
	shrl	$23, %eax
	movl	%eax, (%esp)
	movl	$1127219200, 4(%esp)
	movsd	(%esp), %xmm0
	subsd	LCPI1_0, %xmm0
	cvtsd2ss	%xmm0, %xmm0
	movl	20(%esp), %eax
	movss	%xmm0, (%eax)
	addl	$12, %esp
	ret




git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52747 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-06-26 00:16:49 +00:00
Owen Anderson
6b098dee28 Remember which MachineOperand we were processing, so we don't have to scan the list to find it again later. 
This speeds up live intervals from 0.37s to 0.30s on instcombine.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52745 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-06-25 23:39:39 +00:00
Dan Gohman
48b0b882c7 Fix the text in an assert string. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52744 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-06-25 22:14:43 +00:00
Evan Cheng
ab26227c8c - Fix a x86 vector isel bug: illegal transformation of a vector_shuffle into a 
shift.
- Add a readme entry for a missing vector_shuffle optimization that results in
  awful codegen.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52740 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-06-25 20:52:59 +00:00
Duncan Sands
041cde26ea Add support for expanding PPC 128 bit floats. 
For this it is convenient to permit floats to
be used with EXTRACT_ELEMENT, so I tweaked
things to allow that.  I also added libcalls
for ppcf128 to i32 forms of FP_TO_XINT, since
they exist in libgcc and this case can certainly
occur (and does occur in the testsuite) - before
the i64 libcall was being used.  Also, the
XINT_TO_FP result seemed to be wrong when
the argument is an i128: the wrong fudge
factor was added (the i32 and i64 cases were
handled directly, but the i128 code fell
through to some generic softening code which
seemed to think it was i64 to f32!).  So I
fixed it by adding a fudge factor that I
found in my breakfast cereal.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52739 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-06-25 20:24:48 +00:00
Duncan Sands
11ac797f5e Add/complete support for integer and float 
select_cc and friends.  This code could be
factorized a bit but I'm not sure that it's
worth it.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52724 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-06-25 16:34:21 +00:00
Dan Gohman
fd4418fc9b Remove the OrigVT member from AtomicSDNode, as it is redundant with 
the base SDNode's VTList.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52722 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-06-25 16:07:49 +00:00
Mon P Wang
2887310630 Added MemOperands to Atomic operations since Atomics touches memory. 
Added abstract class MemSDNode for any Node that have an associated MemOperand
Changed atomic.lcs => atomic.cmp.swap, atomic.las => atomic.load.add, and
atomic.lss => atomic.load.sub


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52706 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-06-25 08:15:39 +00:00
Evan Cheng
601ca4b434 Enable two-address remat by default. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52701 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-06-25 01:16:38 +00:00
Owen Anderson
873e1b5642 Use SmallVector instead of std::vector for a minor compile time improvement. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52689 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-06-24 21:44:59 +00:00
Dan Gohman
51cd9d6e07 A brief survey of priority_queue usage in the tree turned this up 
as a questionable case, but the code isn't actually needed.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52657 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-06-23 23:51:16 +00:00
Bill Wendling
ebcba612b5 This situation can occur: 
,------.
    |      |
    |      v
    |   t2 = phi ... t1 ...
    |      |
    |      v
    |   t1 = ...
    |  ... = ... t1 ...
    |      |
    `------'

where there is a use in a PHI node that's a predecessor to the defining
block. We don't want to mark all predecessors as having the value "alive" in
this case. Also, the assert was too restrictive and didn't handle this case.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52655 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-06-23 23:41:14 +00:00
Dan Gohman
aabdded3b4 Use the new PriorityQueue in ScheduleDAGList too, which also 
needs arbitrary-element removal.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52654 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-06-23 23:40:09 +00:00
Owen Anderson
b3db9c90d2 Use getMBBEndIdx rather than assuming that the end is right after the last instruction in the block. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52649 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-06-23 22:12:23 +00:00
Evan Cheng
d17e44769f Remove option used to debug stack coloring bugs. It's no longer needed since stack coloring is now bug free. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52644 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-06-23 21:24:32 +00:00
Dan Gohman
8cb8245cf1 Move a DenseMap's declaration outside of a loop, and just call 
clear() on each iteration. This avoids allocating and deallocating
all of DenseMap's memory on each iteration.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52642 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-06-23 21:15:00 +00:00
Evan Cheng
99ec779a93 Instead of adding an isSS field to LiveInterval to denote stack slot. Use top bit of 'reg' instead. If the top bit is set, than the LiveInterval represents a stack slot live interval. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52639 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-06-23 21:03:19 +00:00
Dan Gohman
0a4627d71f Duncan pointed out this code could be tidied. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52624 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-06-23 15:29:14 +00:00
Duncan Sands
e9c80f4d57 Port some integer multiplication fixes from LegalizeDAG. 
Bail out with an error if there is no libcall available
for the given size of integer.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52622 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-06-23 15:15:44 +00:00
Duncan Sands
4a307ecce6 Support for expanding the result of EXTRACT_ELEMENT. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52621 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-06-23 15:08:15 +00:00
Duncan Sands
ab09b7e8f3 Cleanup up LegalizeTypes handling of loads and 
stores.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52620 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-06-23 14:19:45 +00:00
Duncan Sands
69bfb15ecd Make custom lowering of ADD work correctly. This 
fixes PR2476; patch by Richard Osborne.  The same
problem exists for a bunch of other operators, but
I'm ignoring this because they will be automagically
fixed when the new LegalizeTypes infrastructure lands,
since it already solves this problem centrally.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52610 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-06-22 09:42:16 +00:00
Dan Gohman
5686752099 Simplify some getNode calls. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52604 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-06-21 22:06:07 +00:00
Dan Gohman
2f1d3108e4 canClobberPhysRegDefs shouldn't called without checking hasPhysRegDefs; 
check this with an assert.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52603 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-06-21 22:05:24 +00:00
Dan Gohman
317adcc9c6 Use clear() to zero an existing APInt. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52601 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-06-21 22:02:15 +00:00
Dan Gohman
719de53742 Use back() instead of [size()-1]. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52600 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-06-21 22:00:54 +00:00
Dan Gohman
8d96144b0e Remove a redundant return. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52585 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-06-21 19:34:57 +00:00
Dan Gohman
94d7a5f815 Remove ScheduleDAG's SUnitMap altogether. Instead, use SDNode's NodeId 
field, which is otherwise unused after instruction selection, as an index
into the SUnit array.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52583 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-06-21 19:18:17 +00:00
Dan Gohman
3627e34486 Add a priority queue class, which is a wrapper around std::priority_queue 
and provides fairly efficient removal of arbitrary elements. Switch
ScheduleDAGRRList from std::set to this new priority queue.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52582 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-06-21 18:35:25 +00:00
Duncan Sands
a1ace76c70 Support for load/store of expanded float types. I 
don't know if a truncating store is possible here,
but added support for it anyway.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52577 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-06-21 17:00:47 +00:00
Dan Gohman
4c8c83022b Change ScheduleDAG's SUnitMap from DenseMap<SDNode*, vector<SUnit*> > 
to DenseMap<SDNode*, SUnit*>, and adjust the way cloned SUnit nodes are
handled so that only the original node needs to be in the map.
This speeds up llc on 447.dealII.llvm.bc by about 2%.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52576 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-06-21 15:52:51 +00:00
Evan Cheng
c3417609ae Undo spill weight tweak. Need to investigate the performance regressions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52572 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-06-21 06:45:54 +00:00
Dan Gohman
16c6859651 Simplify some template parameterization. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52571 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-06-21 01:08:22 +00:00
Evan Cheng
3e172254c1 Enhanced heuristic to determine the *best* register to spill. Instead of picking the register with the lowest spill weight. Consider (up to) 2 additional registers with spill weights that are close to the lowest spill weight. The one with fewest defs and uses that conflicts with the current interval (weighted by loop depth) is the spill candidate. 
This is not always a win, but there are much more wins than loses and wins tend to be more noticeable.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52554 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-06-20 21:45:16 +00:00
Duncan Sands
78cd649ad3 Share some code that is common between integer and 
float expansion (and sometimes vector splitting too).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52548 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-06-20 18:40:50 +00:00
Duncan Sands
4fc4fd657d Rename the operation of turning a float type into an 
integer of the same type.  Before it was "promotion",
but this is confusing because it is quite different
to promotion of integers.  Call it "softening" instead,
inspired by "soft float".


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52546 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-06-20 17:49:55 +00:00
Dan Gohman
3461cc9e98 Clean up some uses of std::distance, now that we have allnodes_size. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52545 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-06-20 17:15:19 +00:00
Dan Gohman
ab8ec0a26c Teach ReturnInst lowering about aggregate return values. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52522 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-06-20 01:29:26 +00:00
Dan Gohman
dded0fd398 Fix the index calculations for the extractvalue lowering code. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52517 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-06-20 00:54:19 +00:00
Dan Gohman
8f36f6d117 Simplify the ComputeLinearIndex logic and fix a few bugs. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52516 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-06-20 00:53:00 +00:00
Evan Cheng
c8af52c898 ISD::UNDEF should be expanded recursively / iteratively. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52508 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-06-19 22:01:11 +00:00
Dan Gohman
04478e56f7 Use the transferSuccessors helper function. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52495 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-06-19 17:22:29 +00:00
Evan Cheng
32a3ac7911 Missed a check. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52487 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-06-19 06:17:19 +00:00
Owen Anderson
29b039976f Revert my last patch, which was causing regression test failures. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52485 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-06-19 05:29:34 +00:00
Evan Cheng
e00f5de361 Coalesce copy from one register class to a sub register class. e.g. X86::MOV16to16_. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52480 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-06-19 01:39:21 +00:00
Evan Cheng
1b38ec83f0 Cosmetic changes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52479 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-06-19 01:21:26 +00:00
Evan Cheng
bdf34bc12b Minor spiller tweak to unfavor reload into load/store instructions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52477 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-06-19 01:16:17 +00:00
Owen Anderson
6c5e561668 Insert empty slots into the instruction numbering in live intervals, so that we can more easily 
add new instructions.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52475 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-06-19 00:10:49 +00:00
Argyrios Kyrtzidis
f7acf8f288 Fix the source line debug information for the Windows platform. 
According to DWARF-2 specification, the line information is provided through an offset in the .debug_line section.
Replace the label reference that is used with a section offset.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52468 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-06-18 19:27:37 +00:00
Evan Cheng
7543e58a77 Complete support for two-address pass rematerialization. Now *almost* always a win. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52452 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-06-18 07:49:14 +00:00